The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 2014
Filed:
Apr. 30, 2012
Satyanarayan R. Panpaliya, Palatine, IL (US);
Thomas B. Bohn, McHenry, IL (US);
Dipendra M. Chowdhary, Hoffman Estates, IL (US);
David G. Wiatrowski, Woodstock, IL (US);
Zhijun Zhu, South Barrington, IL (US);
Stephen Lee, Sichuan, CN;
Grace Zhong, Chengdu, CN;
Rui Yang, Sichuan, CN;
Satyanarayan R. Panpaliya, Palatine, IL (US);
Thomas B. Bohn, McHenry, IL (US);
Dipendra M. Chowdhary, Hoffman Estates, IL (US);
David G. Wiatrowski, Woodstock, IL (US);
Zhijun Zhu, South Barrington, IL (US);
Stephen Lee, Sichuan, CN;
Grace Zhong, Chengdu, CN;
Rui Yang, Sichuan, CN;
Motorola Solutions, Inc., Schaumburg, IL (US);
Abstract
A first subscriber unit (SU) operating in a two-way radio frequency (RF) communications system having at least one fixed terminal, one or more channels, and a plurality of subscriber units, generates a first burst of data for transmission to the at least one fixed terminal. The first SU calculates a cyclic redundancy check (CRC) or checksum value over (i) at least a first portion of the first burst of data and (ii) at least a portion of a first private data. The first SU transmits the first burst of data and the calculated CRC/checksum value, but not the first private data, to the at least one fixed terminal. The fixed terminal then calculates its own CRC/checksum over the received burst and its own copy of the first private data, and compares the result with the received CRC/checksum. The fixed terminal authenticates the received burst if the values match.